El-OilOPS FRANytETI. 495 



better pronounced in the skull than in the external dimensions, as 

 shown in the subjoined table ; in the size of the skull there is 

 perhaps an absolute difference between the two species, in the 

 external dimensions decidedly only an average difference : — 



franqueti. buettikoferi. franqueli. biietfikoferi. 



14 iiialeg. 4 males. 10 females. 2 females. 



Skull, totallength ... 4rr8-r)3 54-5- 69 5 41-8-47 49-5-51-5mra. 

 Zygomatic breadth... 268-30 ? - 29 ? -26-5 ? -26 



Mandible 36 -43 43 - 49 33-8-38 S9-5-41 " 



c-mi, crowns 14-5-18 J 8-8- 20 14-5-16-7 167-178 „ 



Forearm 88 -96 92-5-100-5 82 -93 88 -92-5 „ 



3rd metacarpal 625-70 69 -75 60 -66 665-68 



Ear, length 22-25 23-5-27 21-5-25-5 22-5-255" 



Tibia 31-5-37-5 37 -435 ? -345 ? -375 "„ 



Fur. — Soft and silky, moderately long (12-14 mm.) on back, 

 short (6-8 mm.) and closely adpresaed on breast and belly. Fur of 

 back extending on basal half of forearm and on tibia to ankle. 



Colour. — c? ad. skin, teeth -well-worn, Abonuema, S. Nigeria, 

 25 Feb., 2.11.2.4: Back and rump deep Prout's brown tinged 

 ■with dark fawn, this colour passing gradually into brownish fa-wii 

 on nape of neck, and into dark wood-bro-wn on head ; base of hairs 

 not differing ; underparts essentially similar to back, but -with a 

 large and very sharply defined -whitish patch covering the whole of 

 the belly ; epaulettes deep buff; tufts at base of ears whitish. — An 

 adult female from same locality (skin, 21 March, 2.1l.2.ti) is 

 similar in colour but distinctly paler : Hack deep brownish fawn 

 shading to light wood-brown on nape of neck and head ; under- 

 parts somewhat paler than back, whitish patch extending over belly 

 and posterior part of breast ; sides of neck and foreneck cream- 

 white. — An immature male, same place (skin, 21 March, 2.11.2.5) 

 is perfectly similar to the adult female, but with the whitish 

 abdominal patch scarcely indicated. — An adult male from Asaba, 

 S. Nigeria (skin, teeth worn, no date, 95.5.3.7), is similar to the 

 first described adult male (2.11.2.4), but on the whole darker, more 

 approaching vandyck-brown. 



The above four skins of E. f. strepitatis have been selected for 

 description to illustrate the amount of colour variation within one 

 geographical race of the species ; but inasmuch as the various forms 

 of the present genus differ very little (if at all) in colour, they may 

 be taken as fairly illustrative of the colour variation in the whole 

 genus. The first specimen (2.11.2.4) represents the average colour, 

 the second and third a rather })aler, the fourth an unusually dark 

 pattern. The difference (which even between the extremes is by 

 no means very great) is evidently partly quite individual, partly due 

 to a natural bleaching of an originally darker into a paler tinge. 

 The sexes are alike in colour. A sharply defined abdominal patch 

 seems to be fully developed only in adult individuals, but, apart from 

 this, there appears to be no appreciable age difference in colour. 



Range. From the Gold Coast eastward, through Togo, La^os, 

 S. Nigeria, and Camci'oons, to Niam-Niam, the western bank of 



